Micrometer



Jan. 5, 1932. c RQUSE, J 1,839,596

MICROMETER Filed June 15, 1929 awuento'o: Calvin 7K Rouse, Jr.

Wjjness as Pl MW, m1 121. 60m.

atl'oznuza Patented Jan. 5, 1932 UNETED STATES CALVIN N. ROUSE, JR., OFKANSAS. CITY, MISSOURI Application filed June 13,

My invention relates to micrometers for determining the wear onbearings, and while it may be used to advantage for other purposes it isintended more especially for determining the wear on crank shaftbearings of internal combustion engines.

When a knock occurs in an engine due to the worn clearance between theshaft jourstance saidsupport:2;is1prov1ded at: one end with a laterally:projecting. arm bhavingva nals and their split-type bearings the wear mmust be taken up by either removing one or more shims from between thebearing block and the caps, or, if no shims are employed, the meetingfaces of the bearing block and the caps must be filed down or otherwisereduced sufiiciently to take up the wear.

Often only one bearing of the enginerequires adjusting but without aninstrument of this character it is almost impossible for the mechanic todistinguish the worn bearing from the others and hence all of thebearing caps and shims may be removed and the bearings tested before theworn bearing is located, thereby resulting in a loss of time andunnecessary expense.

By employing my instrument all of the bearings of the engine may bequickly tested for wear without necessitating the removal of shims orhearing caps and after the worn hearing has been located the amount ofwear may be accurately determined to a thousandth of an inch, so thatthe mechanic may know how many shims to take out or how much of themeeting faces of the bearing block and the cap must be removed.

In order that the invention may be fully understood, reference will nowbe had to the accompanying drawings in which:

Fig. 1 is a side elevation of the instrument in position for measuringthe amount of wear between a journal and its bearing without removal ofthe bearing cap.

Fig. 2 is a side elevation of the instrument with the indicating meansturned at right angles to the position shown by Fig. 1.

Fig. 3 is a plan view of the instrument.

the bearing cap While determining the amount of Wear.

1929. i Serial lNo. 370,543.

'Fig. 5 'is a sectional view of. acertainsparts I I employed in carryingout theainvention. i Fig. 6 is afragmentary plan view of a modified formof supporting member.

' Referring in detail tothe different partsg2 "designates a supportor-bracketwhichmaywbe "made in different shapesand sizes for usemndifferent types of engines. .Inthe'presentzinlongitudinal slot- 6.forrfittingcloosely over .one of the stud bolts A' which hold;the-;cap. B non thebearing block C in'which'the-zcrank shaft 1) of'theengine is: mounted.

"8 idesignatesza "lifting membernwhiehi-is threaded or otherwiseadjustabl nmountedin 1 an aperture 9 inthe support Zforthe-pnrpose ofraisingthe crank shaft D inethei-wornbearaing so that the extent a ofwear may be accuratelydete'rmined as will hereinafteriappear.

10 designates a teleseopic slide arranged-11:0 move longitudinally in aslide carrier :12 which latter may be either rotated or adjustedlongitudinally in an aperture .113; extending through the supporttz2.Movement ofiithe -q slide:IQislimitedbythe ends of a groove l7 =,=.insaid slide, and a screw 11 threadediin the carrier 12,' whicli latter issecured at-any point of 'its adjustment by suitable-means such as-asetscrew llz threaded in an aperture 1'5 located in one side of thesupport" 2 and communicating "withthe aperture l3.

' "The lowerend 'of'the slide carrier 12 is provided with a circularcasing 16 into whichthe :lower' end of the telescopic slide 10 7extends. 5 The lower portion of the slide 10 is provided with teeth 18which intermesh with a pinion 20 fixedly mounted upon a, shaft whichis ljournaled in the casing, 16. A spiral spring 23 secured atone end to thecasing 16 and at its-opposite-end to the shaft22 rotates the latter in adirection-to urge theislide 16 tothe end of its upward movement. Thelowerportion of the casing 16 has an aperture 25 through whiclrthe lowerend ofthe-slide 10 may pass when said slide is pushed down Fig. 4 is adetail perspective of a support whereby the instrument is held inposition on wardly into 'the carrier IQ/against the action of the spring23. v

The face (if-the casing 16 is-equipped withxa dial 24 having an annularscale 26 which may be divided into thousandths of an inch or with saidsupport for automatically indicatsuch other fractions as desired. A hand28 ing the extent of the upward movement of fixedly mounted upon theforward end of the sa shaft 22 is provided to cooperate with the scale26 in determining the amount of Wear in the bearings.

In practice when it is desired to test the crank shaft bearings of aninternal-combustion engine the nut E on one of the stud bolts A isremoved and the slotted portion 6 of the support 2 is placed in positionover said stud bolt and firmly secured in place with said nut E. Duringthe foregoing operation, care is taken to adjust the lifting member 8and the telescopic slide 10 beneath the adjacent crank F of the mainshaft as shown by Fig. 1. Then while the upper end of the slide 10 isbearing against the crank F the slide carrier 12 is adjusted upwardly totension the spiral spring 23 and swing the hand 28 to the O or zeropoint on the scale26. The lifting member 8 is then adjusted upwardly andif there is any wear the crank shaft 1) is raised until checked by theupper half of the hearing. The slide 10 follows the crank shaftupwardlyand the hand 28 moves over the scale 26 and accurately indicates theamount of wear orv clearance between the crank shaft ournal and itshearing; The other bearings of theiengine may then be successivelytested in a like manner.

In the. modified form shown by Fig. 6 the support 2a has one end splitback to the aper- I ture 9a and provided with ascrew 14a, for

drawing said split end firmly about the carrier 12, so that the setscrew 14 may be disspensed with. v. v V f From the foregoing descriptionit. is apparent that I have provided a micrometer embodying theadvantagesabovepointed out,

andwhile I have shown and described one complete preferred form of theinvention and 'a modified form of the support, I reserve all rights tosuch other forms and modifications as properly fall within the spiritand scope of the invention as claimed,

Having thus described my invention, what .I claim and desire to secureby Letters Patent, is: v

1 A micrometer for determining the wear in crank shaft bearings,consisting of a sup port having alaterally projecting arm adapted tobesecured to any of said bearings, means carried by said support forraising the crank shaft to the extent of the wear between the latter andthe bearing, and means associated wlth said support for indicating theextent of the upward movement of said crank shaft.

2, A micrometer for determining the wear in crank shaft bearings,consisting of a support adapted to be secured to any of said bearlugsmanually controlled threaded means 7 carried by said support for-raisingthe crank shaft to the extent of the wear between the latter and thebearing, and means associated id crank shaft.

In testimony whereof I affix my signature.

